If you're cutting for a long period a loud exhaust can get tiresome more so if the gases are hitting the wood & exiting up towards your face Had a mate who was averse to Stihl mix oil (no sure which one) & the smell/fumes gave him bad headache & made him vomit could I suggest frequent rests & ear defenders & see how you go.One thing is for sure they sound like there ready for battle now if nothing else
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